You might have something wrong with your inner ear (balance organ). If your dizziness feels like you are spinning or the room is spinning, this symptom is called vertigo, and it is often associated with nausea and vomiting. For further evaluation, you might need an audiogram (hearing test) and an electronystagnogram (vertigo test). If you feel lightheaded, especially when going from sitting to standing, this is not related to your inner ear, but may be due to fluctuations in your blood pressure. This is best evaluated by your primary care physician with testing for orthostatic hypotension.
Hello and hope you are doing well.
It could be due to Benign paroxysmal positional vertigo (BPPV), which is an entity in which with movement of the head the person is likely to get dizziness. This happens because of a disorder of the labyrinth system in the inner ear. It can get affected due to head injuries, surgeries, nerve inflammations and as a side effect to medications. In a majority of cases the cause is not known. It is diagnosed by a physical examination and sometimes blood tests, a CT and MRI and audiology tests can further help with diagnosis. Therapy is with diazepam and OTC meclizine. Other measures which help are elevating the head end of the bed, drinking plenty of fluids, avoiding sudden movements of the head and taking precautions with driving during an attack. Please consult your primary care physician who will do an initial clinical assessment and then may refer you to a neurologist.
Hope this helped and do keep us posted.
Vertigo which is what you describe is often an issue with the inner ear. I had severe vertigo that would come and go due to eustacian tube dysfunction. I don't know if that is what the cause is of your dizziness, but it was mine. What does your doctor say?